Publication

ABSTRACT

A NOVEL POLYMER WHICH IS SOLUBLE IN WATER AND IN SOLVENTS THAT FORMS A HIGH QUALITY COATING COMPOSITION IS THE SUBJECT OF THIS INVENTION. THE NOVEL POLYMER COMPRIES (1) AN AROMATIC COMPOUND OF THE GENERAL FORMULA (X,Y-PHENYL)-C(-R)=CH2 WHERE X AND Y CAN BE HYDROGEN, CHLORINE, BROMINE, OR AN ALKYL GROUP AND R CAN BE HYDROGEN OR AN ALKYL GROUP, (2) AN ACRYLIC ESTER, SUCH AS AN ALKYL METHACRYLATE OR AN ALKYL ACRYLATE IN WHICH THE ALKYL GROUP HAS 1-12 CARBON ATOMS, (3) VINYL PYRROLIDONE, (4) HYDROXY ALKYL ACRYLIC ESTER AND (5) AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID. COATING COMPOSITIONS FORMULATED FROM THIS POLYMER, THAT HAS AN UNSUAL HYDROPHILIC/HYDROPHOBIC BALANCE, CAN BE REDUCED TO A SPRAY VISCOSITY WITH WATER OR SOLVENTS WHICH ARE CONSIDERED NOT BE AIR POLLUTANTS WHICH ALLOWS A MANUFACTURER TO COMPLY WITH CURRENT POLLUTION LAWS. THE COMPOSITION MAY ALSO CONTAIN A THERMOSETTING RESIN AND BE UTILIZED IN ELECTROCOATING PROCESSES. ALSO, THE POLYMER FORMS COATINGS WHICH ARE DURABLE, GREASE RESISTANT, SCRATCH RESISTANT, HARD AND ADHERE WELL TO METAL SUBSTRATES, AND ARE USEFUL, FOR EXAMPLE, AW APPLIANCE ENAMELS.

DEFENSHE FEUBELIGATWN UNITED STATES PATENT AND TRADEMARK OFFICEPublished at the request of the applicant or owner in accordance withthe Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of DefensivePublication applications are identified by distinctly numbered seriesand arearranged chronologically. The heading of each abstract indicatesthe number of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication appiicationshavc not been examined as to themerits of alleged invention. The Patent and. Trademark Oifice makes noassertion as to the novelty of the disclosed subject matter.

PUBLISHED FOVEIHIBER i, 1975 9&0 0G. 6

VERSATILE WATER/SOLVENT SOLUBLE PGLY- MER AND CUATENG COB'IPUSETION OFTHE POLYMER Joseph A. Vasta, Woodbnry, N.J., assignor to E. I. du

Pont de Nernonrs and Company, Wilmington, Del.

Continuation of application Ser. No. 263,761, June 19,

1972, which is a continuation-impart of application Scr.

No. 36,480, Way 11, 1970, both now abandoned. This application Apr. 29,1974, Sat. No. 464,897

int. Cl. (108g 51/24 Cl. 26-Il29.4 UA No Bran/ting. 29 PagesSpecification A novel polymer which is soluble in water and in solventsthat forms a high quality coating composition is the subject of thisinvention. The novel polymer comprises (i) an aromatic compound of thegeneral formula where x and y can be hydrogen, chlorine, bromine, or analkyl group and R can be hydrogen or an alkyl group; (2) an acrylicester, such as an alkyl methacrylate or an alkyl acrylate in which thealkyl group has 112 carbon atoms; (3) vinyl pyrrolidone; (4) hydroxyalkyl acrylic ester and (5) an ethylenically unsaturated carboxylicacid. Coating compositions formulated from this polymer, that has anunusual hydrophilic/hydrophobic balance, can be reduced to a sprayviscosity with water or solvents which are considered not to be airpollutants which allows a manufacturer to comply with current pollutionlaws. The composition may also contain a thermosctting resin and beutilized in electrocoating processes. Also, the polymer forms coatingswhich are durable, grease resistant, scratch resistant, hard and adherewell to metal substrates, and are useful, for example, as applianceenamels.

